package com.kurumi.autoprint.util;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.io.FileInputStream;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Base64Img {  
    /** 
     * @Title: GetImageStrFromUrl 
     * @Description: TODO(将一张网络图片转化成Base64字符串) 
     * @param imgURL 网络资源位置 
     * @return Base64字符串 
     */  
    public static String GetImageStrFromUrl(String imgURL) {  
        byte[] data = null;  
        try {  
            // 创建URL  
            URL url = new URL(imgURL);  
            // 创建链接  
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();  
            conn.setRequestMethod("GET");  
            conn.setConnectTimeout(5 * 1000);  
            InputStream inStream = conn.getInputStream();  
            data = new byte[inStream.available()];  
            inStream.read(data);  
            inStream.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        // 对字节数组Base64编码  
        BASE64Encoder encoder = new BASE64Encoder();  
        // 返回Base64编码过的字节数组字符串  
        return encoder.encode(data);  
    }  
  
    /** 
     * @Title: GetImageStrFromPath 
     * @Description: TODO(将一张本地图片转化成Base64字符串) 
     * @param imgPath 
     * @return 
     */  
    public static String GetImageStrFromPath(String imgPath) {  
        InputStream in = null;  
        byte[] data = null;  
        // 读取图片字节数组  
        try {  
            in = new FileInputStream(imgPath);  
            data = new byte[in.available()];  
            in.read(data);  
            in.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        // 对字节数组Base64编码  
        BASE64Encoder encoder = new BASE64Encoder();  
        // 返回Base64编码过的字节数组字符串  
        return encoder.encode(data);  
    }  
  
    /** 
     * @Title: GenerateImage 
     * @Description: TODO(base64字符串转化成图片) 
     * @param imgStr 
     * @return 
     */  
    public static boolean GenerateImage(String imgStr) {  
        if (imgStr == null) // 图像数据为空  
            return false;  
        BASE64Decoder decoder = new BASE64Decoder();  
        try {  
            // Base64解码  
            byte[] b = decoder.decodeBuffer(imgStr);  
            for (int i = 0; i < b.length; ++i) {  
                if (b[i] < 0) {// 调整异常数据  
                    b[i] += 256;  
                }  
            }  
            // 生成jpeg图片  
            String imgFilePath = "d://222.jpg";  
            OutputStream out = new FileOutputStream(imgFilePath);  
            out.write(b);  
            out.flush();  
            out.close();  
            return true;  
        } catch (Exception e) {  
            return false;  
        }  
    }  
}  
